> Basic principles of civilized society like respect of private property (which is the company which is owned by shareholders) and respect of contracts, and these principles are more important than employee wishes to play CEO.

This alone isn't enough to argue that it's not immoral because the company is their private property. What if Amazon bought up all the farmable land in the country/world and started charging prices that were unaffordable to 90% of people and causing starvation. This is comparable to what's happening, but instead of one company it's multiple companies and instead of food price it's employee conditions

edit: to be clear, I know my point isn't enough to prove it IS immoral either, just that the private property point isn't enough to prove that it isn't. I don't think I'm capable of arguing this argument all the way through, But my opinion probably falls closer to Marx than most people. The only thing I do know for sure is that what we have now isn't working, and if capitalists don't want socialism/communism to take over they better fix things soon.